A spy satellite, from the US, has lost power and could hit the Earth. The satellite is about the size of a small bus and could plummet to Earth in a few weeks, government officials said Saturday.

The out-of-control satellite could contain hazardous materials, what is known is that it contains rocket fuel - hydrazine, a colourless liquid which is toxic and can cause harm to anyone who comes into contact with it. Officials are unsure of where the satellite may come down. The officials revealed this information on a condition of anonymity as this information is classified as secret.

Experts believe that this satellite does not pose a threat to people.

If the re-entry of the satellite isn’t controlled, the US runs a risk of exposing its secrets.

It is still unknown when the satellite lost power or how.

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A satellite as it orbits the Earth.